fix

lib/interfaces/Serializable.ts

@@ -1,7 +1,7 @@
-export interface Serializable {
+export abstract class Serializable {
-  serialize(): string;
+  public abstract serialize(): string;
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  public static deserialize (str: string): Serializable {
+    throw new Error ('not implemented');
   }
-
-export interface Deserializable {
-  deserialize(str: string): Serializable;
 }

lib/interfaces/index.ts

@@ -1,2 +1,2 @@
 export { Assignable } from './Assignable';
-export { Serializable, Deserializable } from './Serializable';
+export { Serializable } from './Serializable';